It seems like your browser didn't download the required fonts. Please revise your security settings and try again.

Attention

As of March 1, 2022, the legacy Barracuda Essentials Security, Compliance, and Complete editions are no longer available for purchase. Only existing customers can renew or add users to these plans. The documentation related to these plans will no longer be available after October 30, 2022. For more information on the latest Email Protection plans, see Barracuda Email Protection.

To update your bookmarks, see the following for the latest documentation:

Note that MSP customers should continue to follow Barracuda Essentials for MSPs.

Barracuda Email Security Service IP Ranges

  • Last updated on

The Barracuda Email Security Service connects with your network from various IP addresses, including performing LDAP lookups. To ensure that the service can connect with your network, allow traffic originating from the range of network addresses based on your Barracuda Email Security Service instance.

Important – Note that the IP addresses below are in CIDR notation and express a range of IP addresses. Be sure to use the entire range in your configurations, including the first and last IPs in the range.

Customers Using the Following Instances of the Barracuda Email Security Service Instance
 Network Traffic to ESS (SMTP)Network Traffic from ESS (SMTP and other)
Australia (AU)3.24.133.128/253.24.133.128/25
Canada (CA)15.222.16.128/2515.222.16.128/25
Germany (DE)

35.157.190.224/27

18.185.115.192/26

18.184.203.224/27

35.157.190.224/27
United Kingdom (UK)

35.176.92.96/27

18.133.136.128/26

18.133.136.96/27

35.176.92.96/27
United States (US)

64.235.144.0/20

209.222.80.0/21

64.235.144.0/20

209.222.80.0/21

Ensure Connectivity and Redundancy

Follow these tips to ensure connectivity and redundancy:

  • Open your firewall ports to allow the IP address ranges, based on your Barracuda Email Security Service instance.
  • (Optional) Configure your mail server or router to block inbound email not originating from your Barracuda Email Security Service IP address ranges.
  • If you have a Barracuda Web Security Gateway or Barracuda Web Application Firewall: You might need to exempt ess.barracudanetworks.com from filtering.
  • Exempt traffic coming from the Barracuda Email Security IP addresses from any kind of throttle or rate controls, RBL, and SPF or DKIM scanning.
Last updated on